Soot blower



Dec. 11, 1934. CJA. A WESTERBERG SOOT BLOWER ed Aug. 20, 1932 Patented Dec. 11, 1934 i v I UNITED STATES PATENT OFFICE SOOT BLOWER Carl Axel Arvid Westerberg, Djursholm, Sweden, assignor to Aktiebolaget Superior, Stockholm, Sweden, a joint-stock company of Sweden Application August 20, 1932, Serial No. 629,727

In Sweden August 21, 1931 l .4 Claims. 01. 12 392) The present invention refers to soot blowers spindle 6 being held from rotation at thistime with a common operating member for the adby the friction. of'the parts. The portion of the mission of the steam and for rotating the steam hub 5 located farthest to the right. in Fig. 1 is pipe provided with one or more nozzles. turned down eccentrically so as to form an ec- 5 The invention relates more particularly toapcentric 10; The steam valve spindle 11, which 5 paratus of this general type in which, upon actuis pressed upwardly by means of a spring 12 and ating the operating member, the steam admission a plate 13, maybe depressed by said eccentric 10, valve is first opened and then the steam pipe so that the steam valve 14 is opened, and may be turned through a predetermined arc, whereupon kept in depressed position by a cam disk 15 made 10 the steampipe may be returned to its initial pointegral with the spindle of the apparatus, in 10 sition and the valve then. closed. The object which cam disk is provided a recess16...On1y of the present invention is to provide a soot blower when. this recess is directed downwardly, asshown of this type which is of cheap, simple and reliable in the sections illustrated inl igs; 2, 3 and 4,- construction and in which the opening and 0105- while the eccentric 10 is at the same time situated 2 l5 ing of the valve and the turning of the spindle or so that its smallest radius is directed downward- 1'5 blowertube will be positively brought about in ly, as shown in Fig. 3, will it be possible for the the desired sequence. valve spindle 11 to comerinto so high a position This is of importance on many occasions where that the steam valve can be. closed, and is conit is desired to have the effective blowing angle, sequently closed. When the apparatustakes this that is to say the angle at which theblowingposition and. the lug or abutment '7 is directed up- 20- takes place with a fully open valve, equal to or wardly, the apparatus is in its position of rest, nearly equal to a complete revolution. Fig. 3. a

One form of embodiment of a soot blower or The turning of the common operating memsteam sweeping apparatus of this type is illusb'er, .i'. e., thesprocketwheel 1 is efiected in the trated in the accompanying drawing, Fig. '1 is usual manner by means of a chain (not shown). 25 an axial sectionof the apparatus. Figs. 2, 3 and When sweeping is to be effected, the sprocket 4 are cross sections of the spindle of the appawheel isturned by means of the chain in a clockratus and of adjacent parts on the lines 2-2 wise direction, as viewed in Fig.- 5, the hub 5 and 44 respectively in Fig. 1, Fig. 3 showing the being thus caused to turn in a counterclock-wise 30. apparatus in its position of rest with a member direction, as viewedin Fig.3. Until further, this pertaining to the operating member turned by will not'bring about any turning movement of half a revolution as against the position 'accordthe spindle 6, but the recess 16 still remains diing to Fig. 2. Fig. 5 is an endwise view of'the rected downwardly. However, the valve spindle apparatus. e s 11 is urged downwardly by the eccentric 10, so In the drawing, the three parts of the casing that the valve is brought into its lowermost (fully 35' of the apparatus screwed together are designated open) positionupon a turning movement of the by 20a, 20b and 200. Part 20:; surrounds the valve hub 5 and the eccentric 10 by half a revolution. 14 and the steam supply passage 21 which leads: This :position i'sshown'in Fig.- '2. On continued to th op nin 2' in h sp ndl r' b ow r tube turning, the abutment 8 strikes against the lug 40 6 0f the apparatus, Which p e iS r a a ly or abutment 7, so that the spindle of the apmounted n e Ca paratus (the nozzle pipe) is compelled to parere, th Common Operating member Consists ticipate in the turning movement, which in this of spmcket Wheel 1 Secured to a Shaft 2 mounted manner does not commence, until the steam valve in the parts 20b and 200 of the casing of the aphas been fully o ened, The turning movement paratus Said shaft having a gear Wheel 3 secured is continued in the same direction, until a pointto the inner end thereof which gear wheel er arm 17 connected to the spindle 6 strikes gages centra1.gear. Wheel. 4 arranged about h against a rigid stop pin 18. Turning is then Spmdle This spmdle 15 be cgngected m effected in the opposite direction, the spindle of known manner to the nozzle plpe (no 5 own) the apparatus then standing still due to frictional 5O 0 f h 1 4 t tabl gif fi g ifi gf i g fi gi ig g s; forces, to begin with, until the abutment 9 hits such a manner that the hub may be turned indelug nulfmg thls mampulatlon the valve pendently of said spindle, as long as a lug '2 of spmdle 11 soll k t depressed b the am 15, the spindle is not in contact with either one of d n u d u the splndle of t aptwo abutting surfaces 8 or 9 in the hub 5, the paratus then partic p in the turning m Ve- 55 ment, the valve is kept open, the blowing thus continuing, until the recess 16 is again directed right downwardly, so that the valve spindle will have an opportunity to move upwardly and the steam valve is consequently closed.

In the apparatus in question, arranged with a stop pin 18, the turning. movement will not cover a complete revolution, depending on the thickness of the stop arm 17 as well as of the stop pin.

An effective angle of a complete revolution may be obtained, however, if the stop device 18 is omitted. The procedure of manipulation will then involve turning of the sprocket wheel 1 in a clock-wise direction, as hereinbefore described so that the steam valve 14 is first opened, the spindle of the apparatus being then turned a complete revolution, which is indicated through a suitable designation on a rigid disk 19. Upon a turning movement of a complete revolution, the recess 16 being thus again directed right downwardly, the sprocket wheel is turned in the opposite direction, whereby the eccentric 10 will by degrees permit the valve spindle 11 to rise into its initial position corresponding to the closed position of the steam valve.

A secondary advantage of having the gear wheel hub 5 disengaged from the spindle of the apparatus during a considerable portion of the movements of said hub is to be found in that the member, in this case the eccentric 10, which is to effect the movement of the steam valve has a small pitch, so that a rather small amount of power is required to open the valve, a comparatively small ratio in the operation of the gears being thus rendered possible; the power which is required to open the steam valve is understood to be rather considerable, the whole steam pressure acting on the valve cone.

What I claim is:--

1. A soot blower, including a housing, a rotary blower tube having one end journalled in said housing, means for supplying steam to said housing and blower tube, a steam valve for controlling said steam supply, an actuating member loosely and rotatably mounted'on the blower tube, means for rotating said member, said member having a portion eccentric to the axis of said blower tube and arranged to open said valve upon rotation of said member, means for automatically closing the valve, a cam disk rigidly mounted on said blower tube and arranged to hold the steam valve open in all angular positions of said cam disk except one, and coupling means for connecting said actuating member to said blower tube to rotate said tube and to move said disk to a position to hold said valve open after the initial rota-1 tion of said actuating member has effected the opening of the valve,

2. A soot blower, including a housing, a rotary blower tube having one end journalled in said housing, means for supplying steam to said housing and blower tube, a steam valve for controlling said steam supply, an actuating member loosely and rotatably mounted on the blower tube, means for rotating said member, said member having a portion eccentric to the axis of said blower tube and arranged to open said valve upon rotation of said member, means for automatically closing the valve, a cam disk rigidly mounted on said blower tube and adapted to hold the steam valve open in all angular positions of said disk except one, a projection on said blower tube, and spaced abutments within said actuating member adapted to engage said projection to rotate the blower tube andto move said disk to a position to hold said valve open after said member has rotated an amount suflicient to open said valve.

3. A soot blower, including a housing, a rotary blower tube, having one end journalled in said housing, means for supplying steam to said housing and blower tube, a poppet steam valve within the housing for controlling said steam supply and movable at right angles to the axis of said rotary blower tube, a gear wheel loosely and rotatably mounted on said blower tube, means outside the housing for rotating said gear wheel, the hub of said gear wheel being provided with an eccentric for actuating said poppet valve to open same upon rotation of said gear wheel, means for automatically closing the valve, a cam disk carried by said blower tube and adapted to hold the steam valve open in all angular positions of said disk except one, and coupling means for connecting said gear wheel to said blower tube to rotate said tube and move said cam disk to a position to hold said valve open after said gear wheel has rotated an amount sufiicient for said eccentric to open said valve.

4. A soot blower, including a housing, a rotary blower tube journalled in said housing, means for supplying a blowing medium to said blower tube, a valve for controlling the supply of said medium, means to open said valve and to rotate said blower tube, said means comprising two cam disks actuating said valve, one cam disk being loosely and rotatably mounted on said blower tube and arranged to open said valve whereas the other cam disk is rigidly connected with the said tube and arranged to hold said valve open after said loosely mounted disk has opened the same, coupling means for connecting said cam disks after the loosely mounted cam disk has been moved a sufficient amount to open the valve, and operating means for rotating said loosely mounted disk to cause opening of the valve before the blower tube is rotated.

CARL AXEL ARVID WES'I'ERBERG. 

